Question

2tg945-4cos1500-sin1170

Answer 1

$2tg(5 pi +45^{o})-4cos(8 pi +60^{o})-sin(6 pi +90^{o})=2tg(45^{o})-4cos(60^{o})-sin(90^{o})=2*1-4*0.5-1=2-2-1=-1$

Answer 2

спасибо большое